Footwear sole



FIG. 1 is a front elevational view of a footwear sole showing our new design.

FIG. 2 is a rear elevational view thereof.

FIG. 3 is a left side elevational view thereof.

FIG. 4 is a right side elevational view thereof.

FIG. 5 is a top plan view thereof.

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective view thereof.

The broken line in FIG. 5 indicates a perimeter boundary enclosing an area that is not included in the claimed design. 

The ornamental design for a footwear sole, as shown and described. 